Denoising and artifact rejection for cardiac signal in a sensis system

• US 8,594,773 B2
• Filed: 09/28/2010
• Issued: 11/26/2013
• Est. Priority Date: 04/25/2007
• Status: Active Grant

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: Siemens Medical Solutions USA Incorporated (Siemens AG)
• Inventors: Zhang, Hongxuan, Pelzek, Bryon, Koertge, Detlef W
• Primary Examiner(s): Schaetzle, Kennedy
• Assistant Examiner(s): LEE, ERICA SHENGKAI
• Application Number:
  US12/891,831
• Publication Number:
  US 20110015532A1
• Time in Patent Office: 1,155 Days
• Field of Search: 600/508, 600/509, 702/69, 702/75, 702/84, 128/901, 128/902
• US Class Current: 600/509
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/7207 of noise induced by motion artifacts

Abstract

A system denoises and rejects artifacts from cardiac signals, by accepting a cardiac signal from a patient, processing the cardiac signal from the patient using a frequency band width controllable choke to separate the cardiac signal into predefined frequencies, filtering each of the predefined frequencies to remove dynamic common noise, joining each of the predefined frequencies into a cardiac signal without the dynamic common noise, and providing feedback control of the filtering of each of the predefined frequencies.

Claims

1. A method for denoising and rejecting artifacts from cardiac signals, comprising:

accepting a cardiac signal from a patient;

separating the cardiac signal into signals in predefined frequency bands in the time domain using a frequency band width controllable choke;

filtering each of the signals in the predefined frequency bands to remove dynamic noise;

joining filtered signals of each of the predefined frequency bands into a cardiac signal without the dynamic noise; and

providing a feedback control signal to control the filtering of each of the predefined frequency bands.

2. The method according to claim 1, wherein the filtering of each of the predefined frequency bands to remove dynamic noise is accomplished by identification of interference signals from medical instruments and elimination of noise related to the medical instruments.

3. The method according to claim 1, wherein the dynamic noise removed is a non-linear signal.

4. The method according to claim 1, wherein the signals from the patient are controlled through a computer programmable selection that decreases common mode noise.

5. The method according to claim 1, wherein the filtering of each of the predefined frequencies is through empirical mode decomposition processing.

6. A method for denoising and rejecting artifacts from cardiac signals, comprising:

accepting a cardiac signal from a patient;

separating the cardiac signal from the patient into signals in predefined frequency bands in the time domain using a frequency band width controllable choke;

filtering each of the signals in the predefined frequency bands to remove dynamic noise; and

joining filtered signals of each of the predefined frequency bands into a cardiac signal without the dynamic noise.

7. The method according to claim 6, wherein the filtering of each of the predefined frequencies is through empirical mode decomposition processing.

8. The method according to claim 6, wherein the filtering of each of the predefined frequency bands to remove dynamic noise is accomplished by identification of interference signals from medical instruments and elimination of noise related to the medical instruments.

9. The method according to claim 6, wherein the dynamic noise removed is a non-linear signal.

10. A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for denoising and rejecting artifacts from cardiac signals, comprising:

accepting a cardiac signal from a patient;

separating the cardiac signal from the patient into signals in predefined frequency bands in the time domain using a frequency band width controllable choke;

filtering each of the signals in the predefined frequency bands to remove dynamic noise;

joining filtered signals of each of the predefined frequency bands into a cardiac signal without the dynamic noise; and

providing a feedback control signal to control the filtering of each of the predefined frequency bands.

11. The device according to claim 10, wherein the filtering of each of the predefined frequencies is through empirical mode decomposition processing.

12. The device according to claim 10, wherein the filtering of each of the predefined frequency bands to remove dynamic noise is accomplished by identification of interference signals from medical instruments and elimination of noise related to the medical instruments.

13. The device according to claim 10, wherein the dynamic noise removed is a non-linear signal.

14. A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for denoising and rejecting artifacts from cardiac signals, comprising:

accepting a cardiac signal from a patient;

separating the cardiac signal from the patient into signals in predefined frequency bands in the time domain using a frequency band width controllable choke;

filtering each of the signals in the predefined frequency bands to remove dynamic noise; and

joining filtered signals of each of the predefined frequency bands into a cardiac signal without the dynamic noise.

15. The method according to claim 14, wherein the filtering of each of the predefined frequencies is through empirical mode decomposition processing.

16. The method according to claim 15, wherein the filtering of each of the predefined frequency bands to remove dynamic noise is accomplished by identification of interference signals from medical instruments and elimination of noise related to the medical instruments.

17. The method according to claim 15, wherein the dynamic noise removed is a non-linear signal.

18. The method according to claim 15, including

in the time domain filtering the predefined frequencies produced by the frequency band width controllable choke;

and

using a feedback control for the filtering of the predefined frequencies.

19. The method according to claim 18, including

controlling the frequency band width of the controllable choke.